Revert "[Atomics.waitAsync] Disable flaky test"

This reverts commit b995a8a4.

Reason for revert: Test addition got reverted.

Original change's description:
> [Atomics.waitAsync] Disable flaky test
> 
> TBR=mslekova@chromium.org
> 
> No-Try: true
> Bug: v8:10725, v8:10239
> Change-Id: Ia2f721f8a26a90dda658664315f0170841c3303e
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2306798
> Reviewed-by: Marja Hölttä <marja@chromium.org>
> Reviewed-by: Maya Lekova <mslekova@chromium.org>
> Commit-Queue: Marja Hölttä <marja@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68931}

TBR=marja@chromium.org,mslekova@chromium.org

Change-Id: I0c5565222f509676fe60af5378ad04f806930da3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10725
Bug: v8:10239
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2306800Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68937}

test/mjsunit/mjsunit.status

@@ -73,9 +73,6 @@
   # Enable once multi-byte prefixed opcodes are correctly handled
   'regress/wasm/regress-1065599': [SKIP],
 
-  # https://bugs.chromium.org/p/v8/issues/detail?id=10725
-  'harmony/atomics-waitasync-1thread-buffer-out-of-scope': [SKIP],
-
   ##############################################################################
   # Tests where variants make no sense.
   'd8/enable-tracing': [PASS, NO_VARIANTS],